Some sites are completely free and depend on advertising for revenue.Others utilize the freemium revenue model, offering free registration and use, with optional, paid, premium services.
Match is strictly for teens aged 18 and 19 (as well as young adults, millennials, and seniors, among others).
Once you verify your age and email, you can finish filling out your profile, specify what you’re looking for in a friend, date, or partner, browse through members, receive matches, and send virtual winks and likes.
This is hands down the best pen pal site I've been to.
There's something about the format that is ideal for fostering a different experience here than on other sites, whether they be dating sites or pen pal sites or whatever.
Such companies offer a wide variety of unmoderated matchmaking services, most of which are profile-based.